摘要
针对琼州海峡大埋深和高水压海底隧道管片设计问题,采用有限元数值方法模拟了混凝土管片的内力分布特性.研究表明,管片的最大轴力和弯矩随着隧道的埋深和直径的增加而增加,而随着土层泊松比的增加而减小.管片的最大弯矩位于隧道的顶板和底板处,最大轴力位于隧道两侧的直墙部位.基于有限元计算的管片内力分布与组合以及混凝土结构设计规范,实现了混凝土管片的截面设计.研究结果表明:琼州海峡海底盾构隧道管片不同于一般的地铁盾构管片,弯矩和轴力非常大,需进行双排配筋.
In order to solve segment design problems of subsea tunnel with large deposited depth and high water pressure in Qiongzhou strait,finite element method is used to simulate internal force distributions on concrete segments.Numerical computational results show that the maximum axial force and bending moment increase with increasing deposited depth and diameter of tunnel,and decrease with increasing Poisson’s ration.The maximum bending moment on segments is located in the roof and floor in the tunnel.The maximum axial force is located in the side wall of tunnel.Based on internal force distributions on concrete segments calculated by FEM and load combination and code for design of concrete structures,the section design for concrete segments is performed.The investigations indicate that the concrete segments of tunnel in Qiongzhou strait is different from commonly used segments in urban Metro tunnel and double row reinforce bars must be selected because the axial force and bending moment on concrete segments is very large.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2018年第3期547-552,共6页
Journal of Liaoning Technical University (Natural Science)
基金
国家重点基础研究发展计划资助项目(2015CB057804)
工业装备结构分析国家重点实验室开放基金(S14206)
关键词
琼州海峡海底隧道
大埋深
超高水压
超大直径
内力分析
截面设计
subsea tunnel in Qiongzhou strait
thick overburden
super-high water pressure
super-large diameter
internal force analysis
reinforcement design
